Amid a national controversy about athletes who "take a knee" in silent protest at sporting events, a Democratic lawmaker from Texas says he's making good on his promise to put into motion articles of impeachment against President Donald Trump, a Republican.

"I rise today as a proud American, a person who believes in his country, who salutes the flag and says the Pledge of Allegiance and sings the national anthem," Rep. Al Green said on the House floor Tuesday. "I rise today, Mr. Speaker, to make comments that I never thought I'd have to make in the well of the house of Congress."

Green vowed to file what's called a "privileged resolution" in order to force a vote next week.